1. What is sinusoidal current?
Imagine electricity flowing through a wire. Electric charge moves along it, and this movement is called
.
Does it always flow the same way? Not in an AC circuit. There the current keeps changing its
and its value. This is
.
When the change follows a smooth
,
we call it
.
Its value depends on
.
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Positive direction
Negative direction
Zero crossing
0
Current i
—
Direction
0
Time t
Quick check
Remember this idea
Sinusoidal current is an electric current that changes its magnitude and direction smoothly with time, following a sine wave pattern.
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